Post on 03-Apr-2018
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HUBBELL
Power Systems Printed in USA
NOTE: Hubbell has a policy o continuous product improvement. We reserve the right to change design and specifcations without notice.
Sect
10D
Copyright 2011 & 2012 Hubbell Incorporated 210 North Allen Street Centralia, MO 65240-1395 USA
Type PRS
Programmable Resettable SectionalizerSingle-Phase
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Type PRS Programmable Resettable SectionalizerThe Programmable Resettable Sectionalizer (Type PRS)is a device which has built-in intelligence to discriminatebetween temporary (transient) and permanent aults ondistribution systems. It operates in conjunction with aback-up automatic circuit recloser or a reclosing circuitbreaker. It is specifcally designed or the protection
o single-phase lateral lines. When installed at thebeginning o a lateral, it virtually eliminates nuisanceoutages. Its unctional concept and design greatlyimprove system coordination.
Traditionally, the individual laterals are protected byexpulsion-type used cutouts. These cutouts are intendedto operate only during a permanent ault on the lateralby careully coordinating the use links with the time-current characteristics o the upstream automatic circuitrecloser or reclosing circuit breaker. Unortunately,coordination between use links and upstream automaticcircuit reclosers is unachievable above a ew thousandamperes. Coordination, i achieved on paper, can easilychange as the ault current increases due to largercapacity acilities, addition o larger substations orreconductoring. Errors in re-using is another way thatsystem coordination can be lost.
A sectionalizer is a protective device which has no time-current characteristics. With no use curve to intersectrecloser time-current characteristics, the coordinationrange is extended to the maximum interrupting rating othe upstream protective device (Figure 1).
This practical unction makes the sectionalizer an idealdevice or application on single-phase laterals whereavailable ault currents make coordination unachievablewith uses. Electronic resettable sectionalizers providethe utility with an economical and easily retrofttablemethod o enchancing protection o the distribution
system. An electronic resettable sectionalizer installedat the start o a lateral, in place o a use, can greatlyenhance system coordination service continuity andreliability at reduced costs.
Figure 1. Addition o the CRS eliminates the use curve and extends the coordination range.
FUSE CURVE (25T)
RECLOSERMINIMUMTRIP
RECLOSERFASTCURVE
COORDINATION
RANGE
100 800
MAXIMUMCOORDINATIOPOINT
RECLOSERSLOW CURVE
CURRENT
Traditional Coordination
T
IME
T
IME
RECLOSER
MINIMUM
TRIP
RECLOSER
FAST
CURVE
100
RECLOSER
SLOW CURVE
COORDINATION
RANGE
Coordination with Type PRS
CURRENT
The Type PRS electronic sectionalizer comprises twomajor components: A standard cutout mounting andan electronic module. The design and construction othe Type PRS are such as to enhance reliability andcoordination o the distribution system. The electronicsectionalizer module fts into the standard mounting
o a Chance Type C and S&C Type XS cutout. Thisinterchangeability reduces the cost o retroft installation.
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Operation
The power required or the logic circuit o the Type PRSelectronic sectionalizer is obtained rom the built-incurrent transormer. When a ault occurs, which exceedsthe minimum actuating current o the sectionalizer, thelogic circuit will power-up. The upstream recloseropens the circuit causing the line current to all below thedead line threshold. The logic circuit recognizes thisas a count and stores this occurrence in its memory ortwo minutes. In doing so, the Type PRS merely counts
the backup reclose operations.
Ater a predetermined number o such operations, theType PRS isolates the circuit while the back-up recloseris in the open position. The recloser is then allowed toclose, restoring service to the unaulted sections o thesystem. I the ault is temporary and is cleared beorethe sectionalizer count reaches the predeterminednumber, the sectionalizer remains closed and resets to itsoriginal state ater its reset time expires.
Drop-open operation is the same or both types o the PRSelectronic sectionalizer: Standard (let) and Loadbreak
(right, with Arc Chute interrupter). See ollowing pages orspecifcations and ordering inormation.
Application
The Type PRS electronic
sectionalizer is best suited for
use in the following applications:
Locations where fusecoordination is difcult to
achieve
Areas with insufcient load to
justify investments in apparatussuch as reclosers
Remote locations prone to
transient faults caused by faunaand/or ora
SAIDI improvements
Benets
Improves system reliability
Distinguishes between
permanent and transient faults
to reduce outages
Programmable parameters:Counts, actuating current, reset
time
One programmable unit to meet
all needs per specic voltage
class
Historical data storage for
system overview and analysis
Resettable
For Specications,
see following pages.
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System Voltage:The sectionalizer must have a voltage rating equal to or
greater than the system voltage.Continuous Current:
The sectionalizer must have a continuous current ratingequal to or greater than the anticipated system loadcurrent plus overload.
Where hydraulic reclosers are used, the continuouscurrent rating o the sectionalizer is typically equal tothe continuous current rating o the upstream automaticcircuit recloser.
Minimum Actuating Current:
The minimum actuating current o sectionalizers shouldbe 80% o the phase minimum trip o the source sidesingle-phase automatic circuit recloser (ACR). Where
three-phase reclosers or circuit breakers are used, a usermay want to coordinate sectionalize actuating currentwith the ground trip rating.
Where hydraulic reclosers are used, this is easilyaccomplished by matching the sectionalizer and the
Table A. Recloser/sectionalizer coordination.
Minimum Actuating
Current,Amps 10%
2440
5680
112160224
320
Continuous
Current,Amps
1525
3550
70100140
200
Recloser
Minimum Trip,
Amps
30
5070
100
140200280
400
Typical Sectionalizer Ratings
Type PRS Programmable ResettableElectronic Sectionalizer
Where sectionalizers are used in series, the downstreamsectionalizer should have one less count than theupstream sectionalizer (Figure 3).
Figure 3. Coordination o sectionalizersin series.
PRS
PRS
Number of Counts:
The sectionalizer should be set to operate in at leastone less count than the backup recloser. Example: a4-shot recloser would require a maximum o a 3-count
sectionalizer downstream (Figure 2, line A).In case o a 2-ast/2-slow reclose setting, a 2-countsectionalizer may be used to reduce the number orecloser operations (Figure 2, line B).
Figure 2. Typical distribution system with Type PRStwo- and three-count electronic resettable sectionalizers.
PRS
PRS
PRS
PRS
PRS
reclosers continuous current ratings. The sectionalizersminimum actuating current is 160% o its continuous
current rating and the hydraulic reclosers phase pick-upis 200% o its continuous current rating (160/200=.80).(Table A).
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Type PRS Programmable ResettableElectronic Sectionalizer
For Catalog Number System,
see following pages.
Technical Specications
Rated Power Frequency 60 Hz/50 HzRated Voltage (BIL) 15kV (110kV BIL)
27kV (125kV BIL)
38kV (150/170kV BIL)
Rated Continuous Current 300 Amps
Minimum
Actuating Current
Programmable between
10 A and 480 A
Number of Counts: Programmable for 1, 2, 3
or 4 counts
Reset time: Programmable, 30 seconds
to 300 seconds
with resolution of 1 second
Inrush detection time Less than 1 cycle
Types of inrush currents
detected:
Symmetrical and
Asymmetrical
Method of inrush currents
detection:
Fourier Analysis (FFT)
Deadline detection: Below 300 mA
Total execution time: 100 msec ( 20 msec)
Short time current withstand,
15 cycle: 8600 Amps Sym.
1 second: 4000 Amps Sym.
3 seconds: 3200 Amps Sym.
10 seconds: 2500 Amps Sym.
Momentary current rating: 12,000 Amps. Asym.
*Current measurement accuracy: 5%
Temperature range: -40C to +60C
Maximum Thermal Rating: 300 A continuous current
Surge current withstand 65KA, per ANSI C37.63
Electromagnetic interference per ANSI C37.63
Radio frequency interference per ANSI C37.90.2
USB port Rated IP68
* With 5% accuracy, i the unit is programmed or 50 A actuatingcurrent, then the unit will pick-up the count at 52.5 A and abovebut ignore a count at 47.5 A and below.
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Type PRS Programmable ResettableElectronic Sectionalizer
Programming
Programming o the unit has been simplifed with the
use o Hubbells programming sotware package. Simplyconnect the USB cable provided into the USB port on
the bottom o the unit and then into a computer with the
provided sotware. Provide the inputs or the upstreamdevice and the sotware will provide suggested settings
which the user can accept or override.
Event Log
The programmable sectionalizer contains onboard memory
storage that will record the last 8 events the unit has
seen. Users will be able to download the event log via theUSB port and have access to the measured ault current,
number o counts, and deadline current.
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Silver-platedtop contact
Nickel plated
copper tube
Electronics
Hookstickring
Lowertube casting
LatchingDevice
Uppertube casting
Hookstickring
Trunnion
Lower contact
USB port
Type PRS Programmable ResettableElectronic Sectionalizer
USB CableCat. No. PSC7400177
(must order separately)
POLYMER Cutout
Catalog Number System
CP7
4 = Non-Loadbreak
5 = Loadbreak
Position 3:Cutout Type
4 00 1 BPP
Position 9:Cutout Terminal ConnectorsP = Parallel-grooveE = Small eyeboltL = Large eyeboltT = Electronic Module Only
L
Examples:
To order 27kV Polymer cutout programmable sectionalizer with extended
bracket and large eyebolt connectors = CP74002PPLX. To order 27kV programmable sectionalizer module only = C74002PPT.
To order programmable sectionalizer module only, replace "CP7" with "C7"followed by selections for Positions 3 through 9.
Universal Cutout ToolIdeal or use with Standard ElectronicSectionalizer to easily lit out, place, *openand close. Inverted, secure method alsofts 100 amp use holders o ABB, Chance,S&C cutouts.
Cat. No. PSC4033484 (Wt. 4 oz.)See Tools Catalog Section 2100.*When opening a cutout, follow all
work rules and OSHA regulations.
Not for use with Loadbreak cutouts.
Position 10:Cutout Bracket
Z = No bracketB = NEMA B bracketD = D bracketX = Extended bracketBlank = Electronic Module Only
1 = 15kV, 110kV BIL
2 = 27kV, 125kV BIL(Non-loadbreak only)
15/27kV, 125kV BIL(Loadbreak only)
Position 6:Cutout Insulation Level
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Silver-platedtop contact
Nickel plated
copper tube
Electronics
Hookstickring
Lowertube casting
LatchingDevice
Uppertube casting
Hookstickring
Trunnion
Lower contact
USB port
Type PRS Programmable ResettableElectronic Sectionalizer
USB CableCat. No. PSC7400177
(must order separately)
PORCELAIN Cutout
Catalog Number System
C7
4 = Non-Loadbreak
5 = Loadbreak
Position 3:Cutout Type
4 00 1 BPP
Position 9:Cutout Terminal ConnectorsP = Parallel-grooveE = Small eyeboltL = Large eyeboltT = Electronic Module Only
L
Position 10:
Cutout BracketZ = No bracketB = NEMA B bracketD = D bracketX = Extended bracket
Blank = Electronic ModuleOnly
1 = 15kV, 110kV BIL
2 = 27kV, 125kV BIL (Non-loadbreak only)
15/27kV, 125kV BIL (Loadbreak only)
3 = 38kV, 150kV BIL (Non-loadbreak only)
6 = 38kV, 170kV BIL (Non-loadbreak only)
Position 6:Cutout Insulation Level
Universal Cutout ToolIdeal or use with Standard Electronic
Sectionalizer to easily lit out, place, *openand close. Inverted, secure method alsofts 100 amp use holders o ABB, Chance,S&C cutouts.
Cat. No. PSC4033484 (Wt. 4 oz.)
See Tools Catalog Section 2100.*When opening a cutout, follow all
work rules and OSHA regulations.
Not for use with Loadbreak cutouts.
Examples:
To order 38kV, 170kV BIL Porcelain cutout programmable sectionalizer with
extended bracket and large eyebolt connectors = C74006PPLX.
To order 38kV, 170kV BIL programmable sectionalizer module only = C74006PPT.
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Power Systems
Accessories
Catalog No.T7001325T7001326T7001327
Terminal Connectors
Min. Order Qty.
101010
Description
Parallel-Groove Clamp, tin-plated bronze or No. 6 solid thru 4/0 ACSR or 250 kcmil strandedSmall Eyebolt or No. 8 solid thru 2/0 strandedLarge Eyebolt or No. 6 solid thru 4/0 ACSR or 250 kcmil stranded
C2060283
C2060280C2060299C2060632
Mounting Brackets
NEMA Heavy Duty B Bracket with 11/2" captive bolt or crossarm mounting
Extended Crossarm Bracket (Horizontal section is 25
/8" longer than NEMA B bracket)D Pole Mounting BracketCutout/Arrester Bracket complete with carriage bolts and backstrap
Mounting Bracket Dimensions
Wt. (lb./kg.)0.33 / 0.150.16 / 0.070.40 / 0.14
2.84 / 1.29
3.75 / 1.707.67 / 3.484.00 / 1.81